create_ap gelöscht und howto angefangenHEADmaster

1 files changed, 0 insertions, 1205 deletions

diff --git a/create_ap b/create_ap
deleted file mode 100755
index ff46cf5..0000000
--- a/create_ap
+++ /dev/null
@@ -1,1205 +0,0 @@
-#!/bin/bash
-
-# general dependencies:
-#    bash (to run this script)
-#    util-linux (for getopt)
-#    procps or procps-ng
-#    hostapd
-#    iproute2
-#    iw
-#    iwconfig (you only need this if 'iw' can not recognize your adapter)
-#    haveged (optional)
-
-# dependencies for 'nat' or 'none' Internet sharing method
-#    dnsmasq
-#    iptables
-
-VERSION=0.1
-
-# make sure that all command outputs are in english
-# so we can parse them correctly
-export LC_ALL=C
-
-usage() {
-    echo "Usage: $(basename $0) [options] <wifi-interface> [<interface-with-internet>] [<access-point-name> [<passphrase>]]"
-    echo
-    echo "Options:"
-    echo "  -h, --help          Show this help"
-    echo "  --version           Print version number"
-    echo "  -c <channel>        Channel number (default: 1)"
-    echo "  -w <WPA version>    Use 1 for WPA, use 2 for WPA2, use 1+2 for both (default: 1+2)"
-    echo "  -n                  Disable Internet sharing (if you use this, don't pass"
-    echo "                      the <interface-with-internet> argument)"
-    echo "  -m <method>         Method for Internet sharing."
-    echo "                      Use: 'nat' for NAT (default)"
-    echo "                           'bridge' for bridging"
-    echo "                           'none' for no Internet sharing (equivalent to -n)"
-    echo "  --hidden            Make the Access Point hidden (do not broadcast the SSID)"
-    echo "  --ieee80211n        Enable IEEE 802.11n (HT)"
-    echo "  --ht_capab <HT>     HT capabilities (default: [HT40+])"
-    echo "  --country <code>    Set two-letter country code for regularity (example: US)"
-    echo "  --freq-band <GHz>   Set frequency band. Valid inputs: 2.4, 5 (default: 2.4)"
-    echo "  --driver            Choose your WiFi adapter driver (default: nl80211)"
-    echo "  --no-virt           Do not create virtual interface"
-    echo "  --no-haveged        Do not run \`haveged' automatically when needed"
-    echo "  --fix-unmanaged     If NetworkManager shows your interface as unmanaged after you"
-    echo "                      close create_ap, then use this option to switch your interface"
-    echo "                      back to managed"
-    echo "  --mac <MAC>         Set MAC address"
-    echo "  --daemon            Run create_ap in the background"
-    echo "  --stop <id>         Send stop command to an already running create_ap. For an <id>"
-    echo "                      you can put the PID of create_ap or the WiFi interface. You can"
-    echo "                      get them with --list"
-    echo "  --list              Show the create_ap processes that are already running"
-    echo
-    echo "Non-Bridging Options:"
-    echo "  -g <gateway>        IPv4 Gateway for the Access Point (default: 192.168.12.1)"
-    echo "  -d                  DNS server will take into account /etc/hosts"
-    echo
-    echo "Useful informations:"
-    echo "  * If you're not using the --no-virt option, then you can create an AP with the same"
-    echo "    interface you are getting your Internet connection."
-    echo "  * You can pass your SSID and password through pipe or through arguments (see examples)."
-    echo "  * On bridge method if the <interface-with-internet> is not a bridge interface, then"
-    echo "    a bridge interface is created automatically."
-    echo
-    echo "Examples:"
-    echo "  $(basename $0) wlan0 eth0 MyAccessPoint MyPassPhrase"
-    echo "  echo -e 'MyAccessPoint\nMyPassPhrase' | $(basename $0) wlan0 eth0"
-    echo "  $(basename $0) wlan0 eth0 MyAccessPoint"
-    echo "  echo 'MyAccessPoint' | $(basename $0) wlan0 eth0"
-    echo "  $(basename $0) wlan0 wlan0 MyAccessPoint MyPassPhrase"
-    echo "  $(basename $0) -n wlan0 MyAccessPoint MyPassPhrase"
-    echo "  $(basename $0) -m bridge wlan0 eth0 MyAccessPoint MyPassPhrase"
-    echo "  $(basename $0) -m bridge wlan0 br0 MyAccessPoint MyPassPhrase"
-    echo "  $(basename $0) --driver rtl871xdrv wlan0 eth0 MyAccessPoint MyPassPhrase"
-    echo "  $(basename $0) --daemon wlan0 eth0 MyAccessPoint MyPassPhrase"
-    echo "  $(basename $0) --stop wlan0"
-}
-
-# it takes 2 arguments
-# returns:
-#  0 if v1 (1st argument) and v2 (2nd argument) are the same
-#  1 if v1 is less than v2
-#  2 if v1 is greater than v2
-version_cmp() {
-    [[ ! $1 =~ ^[0-9]+(\.[0-9]+)*$ ]] && die "Wrong version format!"
-    [[ ! $2 =~ ^[0-9]+(\.[0-9]+)*$ ]] && die "Wrong version format!"
-
-    V1=( $(echo $1 | tr '.' ' ') )
-    V2=( $(echo $2 | tr '.' ' ') )
-    VN=${#V1[@]}
-    [[ $VN -lt ${#V2[@]} ]] && VN=${#V2[@]}
-
-    for ((x = 0; x < $VN; x++)); do
-        [[ ${V1[x]} -lt ${V2[x]} ]] && return 1
-        [[ ${V1[x]} -gt ${V2[x]} ]] && return 2
-    done
-
-    return 0
-}
-
-USE_IWCONFIG=0
-
-is_interface() {
-    [[ -z "$1" ]] && return 1
-    [[ -d "/sys/class/net/${1}" ]]
-}
-
-is_wifi_interface() {
-    which iw > /dev/null 2>&1 && iw dev $1 info > /dev/null 2>&1 && return 0
-    if which iwconfig > /dev/null 2>&1 && iwconfig $1 > /dev/null 2>&1; then
-        USE_IWCONFIG=1
-        return 0
-    fi
-    return 1
-}
-
-is_bridge_interface() {
-    [[ -z "$1" ]] && return 1
-    [[ -d "/sys/class/net/${1}/bridge" ]]
-}
-
-get_phy_device() {
-    for x in /sys/class/ieee80211/*; do
-        [[ ! -e "$x" ]] && continue
-        if [[ "${x##*/}" = "$1" ]]; then
-            echo $1
-            return 0
-        elif [[ -e "$x/device/net/$1" ]]; then
-            echo ${x##*/}
-            return 0
-        elif [[ -e "$x/device/net:$1" ]]; then
-            echo ${x##*/}
-            return 0
-        fi
-    done
-    echo "Failed to get phy interface" >&2
-    return 1
-}
-
-get_adapter_info() {
-    PHY=$(get_phy_device "$1")
-    [[ $? -ne 0 ]] && return 1
-    iw phy $PHY info
-}
-
-get_adapter_kernel_module() {
-    MODULE=$(readlink -f "/sys/class/net/$1/device/driver/module")
-    echo ${MODULE##*/}
-}
-
-can_be_sta_and_ap() {
-    # iwconfig does not provide this information, assume false
-    [[ $USE_IWCONFIG -eq 1 ]] && return 1
-    get_adapter_info "$1" | grep -E '{.* managed.* AP.*}' > /dev/null 2>&1 && return 0
-    get_adapter_info "$1" | grep -E '{.* AP.* managed.*}' > /dev/null 2>&1 && return 0
-    return 1
-}
-
-can_be_ap() {
-    # iwconfig does not provide this information, assume true
-    [[ $USE_IWCONFIG -eq 1 ]] && return 0
-    get_adapter_info "$1" | grep -E '\* AP$' > /dev/null 2>&1 && return 0
-    return 1
-}
-
-can_transmit_to_channel() {
-    IFACE=$1
-    CHANNEL_NUM=$2
-
-    if [[ $USE_IWCONFIG -eq 0 ]]; then
-        if [[ $FREQ_BAND == 2.4 ]]; then
-            CHANNEL_INFO=$(get_adapter_info ${IFACE} | grep " 24[0-9][0-9] MHz \[${CHANNEL_NUM}\]")
-        else
-            CHANNEL_INFO=$(get_adapter_info ${IFACE} | grep " \(49[0-9][0-9]\|5[0-9]\{3\}\) MHz \[${CHANNEL_NUM}\]")
-        fi
-        [[ -z "${CHANNEL_INFO}" ]] && return 1
-        [[ "${CHANNEL_INFO}" == *no\ IR* ]] && return 1
-        [[ "${CHANNEL_INFO}" == *disabled* ]] && return 1
-        return 0
-    else
-        CHANNEL_NUM=$(printf '%02d' ${CHANNEL_NUM})
-        CHANNEL_INFO=$(iwlist ${IFACE} channel | grep "Channel ${CHANNEL_NUM} :")
-        [[ -z "${CHANNEL_INFO}" ]] && return 1
-        return 0
-    fi
-}
-
-# taken from iw/util.c
-ieee80211_frequency_to_channel() {
-    FREQ=$1
-    if [[ $FREQ -eq 2484 ]]; then
-        echo 14
-    elif [[ $FREQ -lt 2484 ]]; then
-        echo $(( ($FREQ - 2407) / 5 ))
-    elif [[ $FREQ -ge 4910 && $FREQ -le 4980 ]]; then
-        echo $(( ($FREQ - 4000) / 5 ))
-    elif [[ $FREQ -le 45000 ]]; then
-        echo $(( ($FREQ - 5000) / 5 ))
-    elif [[ $FREQ -ge 58320 && $FREQ -le 64800 ]]; then
-        echo $(( ($FREQ - 56160) / 2160 ))
-    else
-        echo 0
-    fi
-}
-
-is_5ghz_frequency() {
-    [[ $1 =~ ^(49[0-9]{2})|(5[0-9]{3})$ ]]
-}
-
-is_wifi_connected() {
-    if [[ $USE_IWCONFIG -eq 0 ]]; then
-        iw dev "$1" link 2>&1 | grep -E '^Connected to' > /dev/null 2>&1 && return 0
-    else
-        iwconfig "$1" 2>&1 | grep -E 'Access Point: [0-9a-fA-F]{2}:' > /dev/null 2>&1 && return 0
-    fi
-    return 1
-}
-
-is_macaddr() {
-    echo "$1" | grep -E "^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$" > /dev/null 2>&1
-}
-
-is_unicast_macaddr() {
-    is_macaddr "$1" || return 1
-    x=$(echo "$1" | cut -d: -f1)
-    x=$(printf '%d' "0x${x}")
-    [[ $(expr $x % 2) -eq 0 ]]
-}
-
-get_macaddr() {
-    is_interface "$1" || return
-    cat "/sys/class/net/${1}/address"
-}
-
-get_avail_bridge() {
-    i=0
-    while :; do
-        if ! is_interface br${i}; then
-            echo br${i}
-            return
-        fi
-        i=$((i + 1))
-    done
-}
-
-get_virt_iface_name() {
-    i=0
-    while :; do
-        if ! is_interface ap${i}; then
-            echo ap${i}
-            return
-        fi
-        i=$((i+1))
-    done
-}
-
-get_all_macaddrs() {
-    cat /sys/class/net/*/address
-}
-
-get_new_macaddr() {
-    OLDMAC=$(get_macaddr "$1")
-    LAST_BYTE=$(printf %d 0x${OLDMAC##*:})
-    for i in {1..255}; do
-        NEWMAC="${OLDMAC%:*}:$(printf %02x $(( ($LAST_BYTE + $i) % 256 )))"
-        (get_all_macaddrs | grep "$NEWMAC" > /dev/null 2>&1) || break
-    done
-    echo $NEWMAC
-}
-
-# start haveged when needed
-haveged_watchdog() {
-    local show_warn=0
-    while :; do
-        if [[ $(cat /proc/sys/kernel/random/entropy_avail) -lt 1000 ]]; then
-            if ! which haveged > /dev/null 2>&1; then
-                if [[ $show_warn -eq 0 ]]; then
-                    echo "WARN: Low entropy detected. We recommend you to install \`haveged'"
-                    show_warn=1
-                fi
-            elif ! pidof haveged > /dev/null 2>&1; then
-                echo "Low entropy detected, starting haveged"
-                # boost low-entropy
-                haveged -w 1024 -F > /dev/null 2>&1 &
-                local haveged_pid=$!
-                echo $haveged_pid > $CONFDIR/haveged.pid
-                wait $haveged_pid
-            fi
-        fi
-        sleep 2
-    done
-}
-
-NETWORKMANAGER_CONF=/etc/NetworkManager/NetworkManager.conf
-NM_OLDER_VERSION=1
-
-networkmanager_exists() {
-    which nmcli > /dev/null 2>&1 || return 1
-    NM_VER=$(nmcli -v | grep -m1 -oE '[0-9]+(\.[0-9]+)*\.[0-9]+')
-    version_cmp $NM_VER 0.9.9
-    if [[ $? -eq 1 ]]; then
-        NM_OLDER_VERSION=1
-    else
-        NM_OLDER_VERSION=0
-    fi
-    return 0
-}
-
-networkmanager_is_running() {
-    networkmanager_exists || return 1
-    if [[ $NM_OLDER_VERSION -eq 1 ]]; then
-        NMCLI_OUT=$(nmcli -t -f RUNNING nm)
-    else
-        NMCLI_OUT=$(nmcli -t -f RUNNING g)
-    fi
-    [[ "$NMCLI_OUT" == "running" ]]
-}
-
-networkmanager_iface_is_unmanaged() {
-    is_interface "$1" || return 2
-    (nmcli -t -f DEVICE,STATE d | grep -E "^$1:unmanaged$" > /dev/null 2>&1) || return 1
-}
-
-ADDED_UNMANAGED=
-
-networkmanager_add_unmanaged() {
-    networkmanager_exists || return 1
-
-    [[ -d ${NETWORKMANAGER_CONF%/*} ]] || mkdir -p ${NETWORKMANAGER_CONF%/*}
-    [[ -f ${NETWORKMANAGER_CONF} ]] || touch ${NETWORKMANAGER_CONF}
-
-    if [[ $NM_OLDER_VERSION -eq 1 ]]; then
-        if [[ -z "$2" ]]; then
-            MAC=$(get_macaddr "$1")
-        else
-            MAC="$2"
-        fi
-        [[ -z "$MAC" ]] && return 1
-    fi
-
-    UNMANAGED=$(grep -m1 -Eo '^unmanaged-devices=[[:alnum:]:;,-]*' /etc/NetworkManager/NetworkManager.conf)
-    WAS_EMPTY=0
-    [[ -z "$UNMANAGED" ]] && WAS_EMPTY=1
-    UNMANAGED=$(echo "$UNMANAGED" | sed 's/unmanaged-devices=//' | tr ';,' ' ')
-
-    for x in $UNMANAGED; do
-        [[ $x == "mac:${MAC}" ]] && return 2
-        [[ $NM_OLDER_VERSION -eq 0 && $x == "interface-name:${1}" ]] && return 2
-    done
-
-    if [[ $NM_OLDER_VERSION -eq 1 ]]; then
-        UNMANAGED="${UNMANAGED} mac:${MAC}"
-    else
-        UNMANAGED="${UNMANAGED} interface-name:${1}"
-    fi
-
-    UNMANAGED=$(echo $UNMANAGED | sed -e 's/^ //')
-    UNMANAGED="${UNMANAGED// /;}"
-    UNMANAGED="unmanaged-devices=${UNMANAGED}"
-
-    if ! grep -E '^\[keyfile\]' ${NETWORKMANAGER_CONF} > /dev/null 2>&1; then
-        echo -e "\n\n[keyfile]\n${UNMANAGED}" >> ${NETWORKMANAGER_CONF}
-    elif [[ $WAS_EMPTY -eq 1 ]]; then
-        sed -e "s/^\(\[keyfile\].*\)$/\1\n${UNMANAGED}/" -i ${NETWORKMANAGER_CONF}
-    else
-        sed -e "s/^unmanaged-devices=.*/${UNMANAGED}/" -i ${NETWORKMANAGER_CONF}
-    fi
-
-    ADDED_UNMANAGED="${ADDED_UNMANAGED} ${1} "
-
-    return 0
-}
-
-networkmanager_rm_unmanaged() {
-    networkmanager_exists || return 1
-    [[ ! -f ${NETWORKMANAGER_CONF} ]] && return 1
-
-    if [[ $NM_OLDER_VERSION -eq 1 ]]; then
-        if [[ -z "$2" ]]; then
-            MAC=$(get_macaddr "$1")
-        else
-            MAC="$2"
-        fi
-        [[ -z "$MAC" ]] && return 1
-    fi
-
-    UNMANAGED=$(grep -m1 -Eo '^unmanaged-devices=[[:alnum:]:;,-]*' /etc/NetworkManager/NetworkManager.conf | sed 's/unmanaged-devices=//' | tr ';,' ' ')
-
-    [[ -z "$UNMANAGED" ]] && return 1
-
-    [[ -n "$MAC" ]] && UNMANAGED=$(echo $UNMANAGED | sed -e "s/mac:${MAC}\( \|$\)//g")
-    UNMANAGED=$(echo $UNMANAGED | sed -e "s/interface-name:${1}\( \|$\)//g")
-    UNMANAGED=$(echo $UNMANAGED | sed -e 's/ $//')
-
-    if [[ -z "$UNMANAGED" ]]; then
-        sed -e "/^unmanaged-devices=.*/d" -i ${NETWORKMANAGER_CONF}
-    else
-        UNMANAGED="${UNMANAGED// /;}"
-        UNMANAGED="unmanaged-devices=${UNMANAGED}"
-        sed -e "s/^unmanaged-devices=.*/${UNMANAGED}/" -i ${NETWORKMANAGER_CONF}
-    fi
-
-    ADDED_UNMANAGED="${ADDED_UNMANAGED/ ${1} /}"
-
-    return 0
-}
-
-networkmanager_fix_unmanaged() {
-    [[ -f ${NETWORKMANAGER_CONF} ]] || return
-    sed -e "/^unmanaged-devices=.*/d" -i ${NETWORKMANAGER_CONF}
-}
-
-networkmanager_rm_unmanaged_if_needed() {
-    [[ $ADDED_UNMANAGED =~ .*\ ${1}\ .* ]] && networkmanager_rm_unmanaged $1 $2
-}
-
-networkmanager_wait_until_unmanaged() {
-    networkmanager_is_running || return 1
-    while :; do
-        networkmanager_iface_is_unmanaged "$1"
-        RES=$?
-        [[ $RES -eq 0 ]] && break
-        [[ $RES -eq 2 ]] && die "Interface '${1}' does not exists.
-       It's probably renamed by a udev rule."
-        sleep 1
-    done
-    sleep 2
-    return 0
-}
-
-
-CHANNEL=default
-GATEWAY=192.168.12.1
-WPA_VERSION=1+2
-ETC_HOSTS=0
-HIDDEN=0
-SHARE_METHOD=nat
-IEEE80211N=0
-HT_CAPAB='[HT40+]'
-DRIVER=nl80211
-NO_VIRT=0
-FIX_UNMANAGED=0
-COUNTRY=
-FREQ_BAND=2.4
-NEW_MACADDR=
-DAEMONIZE=0
-LIST_RUNNING=0
-STOP_ID=
-NO_HAVEGED=0
-
-CONFDIR=
-WIFI_IFACE=
-VWIFI_IFACE=
-INTERNET_IFACE=
-BRIDGE_IFACE=
-OLD_IP_FORWARD=
-OLD_BRIDGE_IPTABLES=
-OLD_MACADDR=
-IP_ADDRS=
-ROUTE_ADDRS=
-
-HAVEGED_WATCHDOG_PID=
-
-_cleanup() {
-    trap "" SIGINT
-    trap "" SIGUSR1
-
-    # kill haveged_watchdog
-    [[ -n "$HAVEGED_WATCHDOG_PID" ]] && kill $HAVEGED_WATCHDOG_PID
-
-    # exiting
-    for x in $CONFDIR/*.pid; do
-        # even if the $CONFDIR is empty, the for loop will assign
-        # a value in $x. so we need to check if the value is a file
-        if [[ -f $x ]]; then
-            PID=$(cat $x)
-            disown $PID
-            kill -9 $PID
-        fi
-    done
-    rm -rf $CONFDIR
-
-    if [[ "$SHARE_METHOD" != "none" ]]; then
-        if [[ "$SHARE_METHOD" == "nat" ]]; then
-            iptables -t nat -D POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE
-            iptables -D FORWARD -i ${WIFI_IFACE} -s ${GATEWAY%.*}.0/24 -j ACCEPT
-            iptables -D FORWARD -i ${INTERNET_IFACE} -d ${GATEWAY%.*}.0/24 -j ACCEPT
-            [[ -n "$OLD_IP_FORWARD" ]] && echo $OLD_IP_FORWARD > /proc/sys/net/ipv4/ip_forward
-        elif [[ "$SHARE_METHOD" == "bridge" ]]; then
-            if [[ -n "$OLD_BRIDGE_IPTABLES" ]]; then
-                echo $OLD_BRIDGE_IPTABLES > /proc/sys/net/bridge/bridge-nf-call-iptables
-            fi
-
-            if ! is_bridge_interface $INTERNET_IFACE; then
-                ip link set dev $BRIDGE_IFACE down
-                ip link set dev $INTERNET_IFACE down
-                ip link set dev $INTERNET_IFACE promisc off
-                ip link set dev $INTERNET_IFACE nomaster
-                ip link delete $BRIDGE_IFACE type bridge
-                ip addr flush $INTERNET_IFACE
-                ip link set dev $INTERNET_IFACE up
-
-                for x in "${IP_ADDRS[@]}"; do
-                    x="${x/inet/}"
-                    x="${x/secondary/}"
-                    x="${x/dynamic/}"
-                    x=$(echo $x | sed 's/\([0-9]\)sec/\1/g')
-                    x="${x/${INTERNET_IFACE}/}"
-                    ip addr add $x dev $INTERNET_IFACE
-                done
-
-                ip route flush dev $INTERNET_IFACE
-
-                for x in "${ROUTE_ADDRS[@]}"; do
-                    [[ -z "$x" ]] && continue
-                    [[ "$x" == default* ]] && continue
-                    ip route add $x dev $INTERNET_IFACE
-                done
-
-                for x in "${ROUTE_ADDRS[@]}"; do
-                    [[ -z "$x" ]] && continue
-                    [[ "$x" != default* ]] && continue
-                    ip route add $x dev $INTERNET_IFACE
-                done
-
-                networkmanager_rm_unmanaged_if_needed $INTERNET_IFACE
-            fi
-        fi
-    fi
-
-    if [[ "$SHARE_METHOD" != "bridge" ]]; then
-        iptables -D INPUT -p tcp -m tcp --dport 53 -j ACCEPT
-        iptables -D INPUT -p udp -m udp --dport 53 -j ACCEPT
-        iptables -D INPUT -p udp -m udp --dport 67 -j ACCEPT
-    fi
-
-    if [[ $NO_VIRT -eq 0 ]]; then
-        if [[ -n "$VWIFI_IFACE" ]]; then
-            ip link set down dev ${VWIFI_IFACE}
-            ip addr flush ${VWIFI_IFACE}
-            networkmanager_rm_unmanaged_if_needed ${VWIFI_IFACE} ${OLD_MACADDR}
-            iw dev ${VWIFI_IFACE} del
-        fi
-    else
-        ip link set down dev ${WIFI_IFACE}
-        ip addr flush ${WIFI_IFACE}
-        if [[ -n "$NEW_MACADDR" ]]; then
-            ip link set dev ${WIFI_IFACE} address ${OLD_MACADDR}
-        fi
-        networkmanager_rm_unmanaged_if_needed ${WIFI_IFACE} ${OLD_MACADDR}
-    fi
-}
-
-cleanup() {
-    echo
-    echo -n "Doing cleanup.. "
-    _cleanup > /dev/null 2>&1
-    echo "done"
-}
-
-die() {
-    [[ -n "$1" ]] && echo -e "\nERROR: $1\n" >&2
-    cleanup
-    exit 1
-}
-
-clean_exit() {
-    cleanup
-    exit 0
-}
-
-list_running() {
-    for x in /tmp/create_ap.*; do
-        if [[ -f $x/pid ]]; then
-            PID=$(cat $x/pid)
-            if [[ -d /proc/$PID ]]; then
-                IFACE=${x#*.}
-                IFACE=${IFACE%%.*}
-                echo $PID $IFACE
-            fi
-        fi
-    done
-}
-
-is_running_pid() {
-    list_running | grep -E "^${1} " > /dev/null 2>&1
-}
-
-send_stop() {
-    # send stop signal to specific pid
-    if is_running_pid $1; then
-        kill -USR1 $1
-        return
-    fi
-
-    # send stop signal to specific interface
-    for x in $(list_running | grep -E " ${1}\$" | cut -f1 -d' '); do
-        kill -USR1 $x
-    done
-}
-
-# if the user press ctrl+c then execute die()
-trap "clean_exit" SIGINT
-trap "clean_exit" SIGUSR1
-
-ARGS=( "$@" )
-GETOPT_ARGS=$(getopt -o hc:w:g:dnm: -l "help","hidden","ieee80211n","ht_capab:","driver:","no-virt","fix-unmanaged","country:","freq-band:","mac:","daemon","stop:","list","version","no-haveged" -n $(basename $0) -- "$@")
-[[ $? -ne 0 ]] && exit 1
-eval set -- "$GETOPT_ARGS"
-
-while :; do
-    case "$1" in
-        -h|--help)
-            usage
-            exit 1
-            ;;
-        --version)
-            echo $VERSION
-            exit 0
-            ;;
-        --hidden)
-            shift
-            HIDDEN=1
-            ;;
-        -c)
-            shift
-            CHANNEL="$1"
-            shift
-            ;;
-        -w)
-            shift
-            WPA_VERSION="$1"
-            [[ "$WPA_VERSION" == "2+1" ]] && WPA_VERSION=1+2
-            shift
-            ;;
-        -g)
-            shift
-            GATEWAY="$1"
-            shift
-            ;;
-        -d)
-            shift
-            ETC_HOSTS=1
-            ;;
-        -n)
-            shift
-            SHARE_METHOD=none
-            ;;
-        -m)
-            shift
-            SHARE_METHOD="$1"
-            shift
-            ;;
-        --ieee80211n)
-            shift
-            IEEE80211N=1
-            ;;
-        --ht_capab)
-            shift
-            HT_CAPAB="$1"
-            shift
-            ;;
-        --driver)
-            shift
-            DRIVER="$1"
-            shift
-            ;;
-        --no-virt)
-            shift
-            NO_VIRT=1
-            ;;
-        --fix-unmanaged)
-            shift
-            FIX_UNMANAGED=1
-            ;;
-        --country)
-            shift
-            COUNTRY="$1"
-            shift
-            ;;
-        --freq-band)
-            shift
-            FREQ_BAND="$1"
-            shift
-            ;;
-        --mac)
-            shift
-            NEW_MACADDR="$1"
-            shift
-            ;;
-        --daemon)
-            shift
-            DAEMONIZE=1
-            ;;
-        --stop)
-            shift
-            STOP_ID="$1"
-            shift
-            ;;
-        --list)
-            shift
-            LIST_RUNNING=1
-            ;;
-        --no-haveged)
-            shift
-            NO_HAVEGED=1
-            ;;
-        --)
-            shift
-            break
-            ;;
-    esac
-done
-
-if [[ $# -lt 1 && $FIX_UNMANAGED -eq 0  && -z "$STOP_ID" && $LIST_RUNNING -eq 0 ]]; then
-    usage >&2
-    exit 1
-fi
-
-if [[ $(id -u) -ne 0 ]]; then
-    echo "You must run it as root." >&2
-    exit 1
-fi
-
-if [[ -n "$STOP_ID" ]]; then
-    send_stop "$STOP_ID"
-    exit 0
-fi
-
-if [[ $LIST_RUNNING -eq 1 ]]; then
-    list_running
-    exit 0
-fi
-
-if [[ $FIX_UNMANAGED -eq 1 ]]; then
-    networkmanager_fix_unmanaged
-    exit 0
-fi
-
-if [[ $DAEMONIZE -eq 1 ]]; then
-    # remove --daemon
-    NEW_ARGS=( )
-    for x in "${ARGS[@]}"; do
-        [[ "$x" != "--daemon" ]] && NEW_ARGS+=( "$x" )
-    done
-
-    # run a detached create_ap
-    setsid "$0" "${NEW_ARGS[@]}" &
-    exit 0
-fi
-
-if [[ $FREQ_BAND != 2.4 && $FREQ_BAND != 5 ]]; then
-    echo "ERROR: Invalid frequency band" >&2
-    exit 1
-fi
-
-if [[ $CHANNEL == default ]]; then
-    if [[ $FREQ_BAND == 2.4 ]]; then
-        CHANNEL=1
-    else
-        CHANNEL=36
-    fi
-fi
-
-if [[ $FREQ_BAND != 5 && $CHANNEL -gt 14 ]]; then
-    echo "Channel number is greater than 14, assuming 5GHz frequency band"
-    FREQ_BAND=5
-fi
-
-WIFI_IFACE=$1
-
-if ! is_wifi_interface ${WIFI_IFACE}; then
-    echo "ERROR: '${WIFI_IFACE}' is not a WiFi interface" >&2
-    exit 1
-fi
-
-if ! can_be_ap ${WIFI_IFACE}; then
-    echo "ERROR: Your adapter does not support AP (master) mode" >&2
-    exit 1
-fi
-
-if ! can_be_sta_and_ap ${WIFI_IFACE}; then
-    if is_wifi_connected ${WIFI_IFACE}; then
-        echo "ERROR: Your adapter can not be a station (i.e. be connected) and an AP at the same time" >&2
-        exit 1
-    elif [[ $NO_VIRT -eq 0 ]]; then
-        echo "WARN: Your adapter does not fully support AP virtual interface, enabling --no-virt" >&2
-        NO_VIRT=1
-    fi
-fi
-
-if [[ $(get_adapter_kernel_module ${WIFI_IFACE}) =~ ^(8192[cd][ue]|8723a[sue])$ ]]; then
-    if ! strings $(which hostapd) | grep -m1 rtl871xdrv > /dev/null 2>&1; then
-        echo "ERROR: You need to patch your hostapd with rtl871xdrv patches." >&2
-        exit 1
-    fi
-
-    if [[ $DRIVER != "rtl871xdrv" ]]; then
-        echo "WARN: Your adapter needs rtl871xdrv, enabling --driver=rtl871xdrv" >&2
-        DRIVER=rtl871xdrv
-    fi
-fi
-
-if [[ "$SHARE_METHOD" != "nat" && "$SHARE_METHOD" != "bridge" && "$SHARE_METHOD" != "none" ]]; then
-    echo "ERROR: Wrong Internet sharing method" >&2
-    echo
-    usage >&2
-    exit 1
-fi
-
-if [[ -n "$NEW_MACADDR" ]]; then
-    if ! is_macaddr "$NEW_MACADDR"; then
-        echo "ERROR: '${NEW_MACADDR}' is not a valid MAC address" >&2
-        exit 1
-    fi
-
-    if ! is_unicast_macaddr "$NEW_MACADDR"; then
-        echo "ERROR: The first byte of MAC address (${NEW_MACADDR}) must be even" >&2
-        exit 1
-    fi
-
-    if [[ $(get_all_macaddrs | grep -c ${NEW_MACADDR}) -ne 0 ]]; then
-        echo "WARN: MAC address '${NEW_MACADDR}' already exists. Because of this, you may encounter some problems" >&2
-    fi
-fi
-
-if [[ "$SHARE_METHOD" != "none" ]]; then
-    MIN_REQUIRED_ARGS=2
-else
-    MIN_REQUIRED_ARGS=1
-fi
-
-if [[ $# -gt $MIN_REQUIRED_ARGS ]]; then
-    if [[ "$SHARE_METHOD" != "none" ]]; then
-        if [[ $# -ne 3 && $# -ne 4 ]]; then
-            usage >&2
-            exit 1
-        fi
-        INTERNET_IFACE=$2
-        SSID=$3
-        PASSPHRASE=$4
-    else
-        if [[ $# -ne 2 && $# -ne 3 ]]; then
-            usage >&2
-            exit 1
-        fi
-        SSID=$2
-        PASSPHRASE=$3
-    fi
-else
-    if [[ "$SHARE_METHOD" != "none" ]]; then
-        if [[ $# -ne 2 ]]; then
-            usage >&2
-            exit 1
-        fi
-        INTERNET_IFACE=$2
-    fi
-    if tty -s; then
-        while :; do
-            read -p "SSID: " SSID
-            if [[ ${#SSID} -lt 1 || ${#SSID} -gt 32 ]]; then
-                echo "ERROR: Invalid SSID length ${#SSID} (expected 1..32)" >&2
-                continue
-            fi
-            break
-        done
-        while :; do
-            read -p "Passphrase: " -s PASSPHRASE
-            echo
-            if [[ ${#PASSPHRASE} -gt 0 && ${#PASSPHRASE} -lt 8 ]] || [[ ${#PASSPHRASE} -gt 63 ]]; then
-                echo "ERROR: Invalid passphrase length ${#PASSPHRASE} (expected 8..63)" >&2
-                continue
-            fi
-            read -p "Retype passphrase: " -s PASSPHRASE2
-            echo
-            if [[ "$PASSPHRASE" != "$PASSPHRASE2" ]]; then
-                echo "Passphrases do not match."
-            else
-                break
-            fi
-        done
-    else
-        read SSID
-        read PASSPHRASE
-    fi
-fi
-
-if [[ "$SHARE_METHOD" != "none" ]] && ! is_interface $INTERNET_IFACE; then
-    echo "ERROR: '${INTERNET_IFACE}' is not an interface" >&2
-    exit 1
-fi
-
-if [[ ${#SSID} -lt 1 || ${#SSID} -gt 32 ]]; then
-    echo "ERROR: Invalid SSID length ${#SSID} (expected 1..32)" >&2
-    exit 1
-fi
-
-if [[ ${#PASSPHRASE} -gt 0 && ${#PASSPHRASE} -lt 8 ]] || [[ ${#PASSPHRASE} -gt 63 ]]; then
-    echo "ERROR: Invalid passphrase length ${#PASSPHRASE} (expected 8..63)" >&2
-    exit 1
-fi
-
-if [[ $(get_adapter_kernel_module ${WIFI_IFACE}) =~ ^rtl[0-9].*$ ]]; then
-    if [[ -n "$PASSPHRASE" ]]; then
-        echo "WARN: Realtek drivers usually have problems with WPA1, enabling -w 2" >&2
-        WPA_VERSION=2
-    fi
-    echo "WARN: If AP doesn't work, please read: howto/realtek.md" >&2
-fi
-
-if [[ "$SHARE_METHOD" == "bridge" ]]; then
-    if [[ -e /proc/sys/net/bridge/bridge-nf-call-iptables ]]; then
-        OLD_BRIDGE_IPTABLES=$(cat /proc/sys/net/bridge/bridge-nf-call-iptables)
-    fi
-
-    if is_bridge_interface $INTERNET_IFACE; then
-        BRIDGE_IFACE=$INTERNET_IFACE
-    else
-        BRIDGE_IFACE=$(get_avail_bridge)
-    fi
-elif [[ "$SHARE_METHOD" == "nat" ]]; then
-    OLD_IP_FORWARD=$(cat /proc/sys/net/ipv4/ip_forward)
-fi
-
-if [[ $NO_VIRT -eq 1 && "$WIFI_IFACE" == "$INTERNET_IFACE" ]]; then
-    echo -n "ERROR: You can not share your connection from the same" >&2
-    echo " interface if you are using --no-virt option." >&2
-    exit 1
-fi
-
-CONFDIR=$(mktemp -d /tmp/create_ap.${WIFI_IFACE}.conf.XXXXXXXX)
-echo "Config dir: $CONFDIR"
-echo "PID: $$"
-echo $$ > $CONFDIR/pid
-
-if [[ $NO_VIRT -eq 0 ]]; then
-    VWIFI_IFACE=$(get_virt_iface_name)
-
-    # in NetworkManager 0.9.9 and above we can set the interface as unmanaged without
-    # the need of MAC address, so we set it before we create the virtual interface.
-    if networkmanager_is_running && [[ $NM_OLDER_VERSION -eq 0 ]]; then
-        echo -n "Network Manager found, set ${VWIFI_IFACE} as unmanaged device... "
-        networkmanager_add_unmanaged ${VWIFI_IFACE}
-        # do not call networkmanager_wait_until_unmanaged because interface does not
-        # exist yet
-        echo "DONE"
-    fi
-
-    if is_wifi_connected ${WIFI_IFACE}; then
-        WIFI_IFACE_FREQ=$(iw dev ${WIFI_IFACE} link | grep -i freq | awk '{print $2}')
-        WIFI_IFACE_CHANNEL=$(ieee80211_frequency_to_channel ${WIFI_IFACE_FREQ})
-        echo -n "${WIFI_IFACE} is already associated with channel ${WIFI_IFACE_CHANNEL} (${WIFI_IFACE_FREQ} MHz)"
-        if is_5ghz_frequency $WIFI_IFACE_FREQ; then
-            FREQ_BAND=5
-        else
-            FREQ_BAND=2.4
-        fi
-        if [[ $WIFI_IFACE_CHANNEL -ne $CHANNEL ]]; then
-            echo ", fallback to channel ${WIFI_IFACE_CHANNEL}"
-            CHANNEL=$WIFI_IFACE_CHANNEL
-        else
-            echo
-        fi
-    fi
-
-    VIRTDIEMSG="Maybe your WiFi adapter does not fully support virtual interfaces.
-       Try again with --no-virt."
-    echo -n "Creating a virtual WiFi interface... "
-
-    if iw dev ${WIFI_IFACE} interface add ${VWIFI_IFACE} type managed; then
-        # now we can call networkmanager_wait_until_unmanaged
-        networkmanager_is_running && [[ $NM_OLDER_VERSION -eq 0 ]] && networkmanager_wait_until_unmanaged ${VWIFI_IFACE}
-        echo "${VWIFI_IFACE} created."
-    else
-        VWIFI_IFACE=
-        die "$VIRTDIEMSG"
-    fi
-    OLD_MACADDR=$(get_macaddr ${VWIFI_IFACE})
-    if [[ -z "$NEW_MACADDR" && $(get_all_macaddrs | grep -c ${OLD_MACADDR}) -ne 1 ]]; then
-        NEW_MACADDR=$(get_new_macaddr ${VWIFI_IFACE})
-    fi
-    WIFI_IFACE=${VWIFI_IFACE}
-else
-    OLD_MACADDR=$(get_macaddr ${WIFI_IFACE})
-fi
-
-can_transmit_to_channel ${WIFI_IFACE} ${CHANNEL} || die "Your adapter can not transmit to channel ${CHANNEL}, frequency band ${FREQ_BAND}GHz."
-
-if networkmanager_is_running && ! networkmanager_iface_is_unmanaged ${WIFI_IFACE}; then
-    echo -n "Network Manager found, set ${WIFI_IFACE} as unmanaged device... "
-    networkmanager_add_unmanaged ${WIFI_IFACE}
-    networkmanager_wait_until_unmanaged ${WIFI_IFACE}
-    echo "DONE"
-fi
-
-[[ $HIDDEN -eq 1 ]] && echo "Access Point's SSID is hidden!"
-
-# hostapd config
-cat << EOF > $CONFDIR/hostapd.conf
-beacon_int=100
-ssid=${SSID}
-interface=${WIFI_IFACE}
-driver=${DRIVER}
-channel=${CHANNEL}
-ctrl_interface=$CONFDIR/hostapd_ctrl
-ctrl_interface_group=0
-ignore_broadcast_ssid=$HIDDEN
-EOF
-
-if [[ -n $COUNTRY ]]; then
-    [[ $USE_IWCONFIG -eq 0 ]] && iw reg set $COUNTRY
-    echo "country_code=${COUNTRY}" >> $CONFDIR/hostapd.conf
-fi
-
-if [[ $FREQ_BAND == 2.4 ]]; then
-    echo "hw_mode=g" >> $CONFDIR/hostapd.conf
-else
-    echo "hw_mode=a" >> $CONFDIR/hostapd.conf
-fi
-
-if [[ $IEEE80211N -eq 1 ]]; then
-    cat << EOF >> $CONFDIR/hostapd.conf
-ieee80211n=1
-wmm_enabled=1
-ht_capab=${HT_CAPAB}
-EOF
-fi
-
-if [[ -n "$PASSPHRASE" ]]; then
-    [[ "$WPA_VERSION" == "1+2" ]] && WPA_VERSION=3
-    cat << EOF >> $CONFDIR/hostapd.conf
-wpa=${WPA_VERSION}
-wpa_passphrase=$PASSPHRASE
-wpa_key_mgmt=WPA-PSK
-wpa_pairwise=TKIP CCMP
-rsn_pairwise=CCMP
-EOF
-fi
-
-if [[ "$SHARE_METHOD" == "bridge" ]]; then
-    echo "bridge=${BRIDGE_IFACE}" >> $CONFDIR/hostapd.conf
-else
-    # dnsmasq config (dhcp + dns)
-    DNSMASQ_VER=$(dnsmasq -v | grep -m1 -oE '[0-9]+(\.[0-9]+)*\.[0-9]+')
-    version_cmp $DNSMASQ_VER 2.63
-    if [[ $? -eq 1 ]]; then
-        DNSMASQ_BIND=bind-interfaces
-    else
-        DNSMASQ_BIND=bind-dynamic
-    fi
-    cat << EOF > $CONFDIR/dnsmasq.conf
-listen-address=${GATEWAY}
-${DNSMASQ_BIND}
-dhcp-range=${GATEWAY%.*}.1,${GATEWAY%.*}.254,255.255.255.0,24h
-dhcp-option=option:router,${GATEWAY}
-EOF
-    [[ $ETC_HOSTS -eq 0 ]] && echo no-hosts >> $CONFDIR/dnsmasq.conf
-fi
-
-# initialize WiFi interface
-if [[ $NO_VIRT -eq 0 && -n "$NEW_MACADDR" ]]; then
-    ip link set dev ${WIFI_IFACE} address ${NEW_MACADDR} || die "$VIRTDIEMSG"
-fi
-
-ip link set down dev ${WIFI_IFACE} || die "$VIRTDIEMSG"
-ip addr flush ${WIFI_IFACE} || die "$VIRTDIEMSG"
-
-if [[ $NO_VIRT -eq 1 && -n "$NEW_MACADDR" ]]; then
-    ip link set dev ${WIFI_IFACE} address ${NEW_MACADDR} || die
-fi
-
-if [[ "$SHARE_METHOD" != "bridge" ]]; then
-    ip link set up dev ${WIFI_IFACE} || die "$VIRTDIEMSG"
-    ip addr add ${GATEWAY}/24 broadcast ${GATEWAY%.*}.255 dev ${WIFI_IFACE} || die "$VIRTDIEMSG"
-fi
-
-# enable Internet sharing
-if [[ "$SHARE_METHOD" != "none" ]]; then
-    echo "Sharing Internet using method: $SHARE_METHOD"
-    if [[ "$SHARE_METHOD" == "nat" ]]; then
-        iptables -t nat -I POSTROUTING -o ${INTERNET_IFACE} -j MASQUERADE || die
-        iptables -I FORWARD -i ${WIFI_IFACE} -s ${GATEWAY%.*}.0/24 -j ACCEPT || die
-        iptables -I FORWARD -i ${INTERNET_IFACE} -d ${GATEWAY%.*}.0/24 -j ACCEPT || die
-        echo 1 > /proc/sys/net/ipv4/ip_forward || die
-    elif [[ "$SHARE_METHOD" == "bridge" ]]; then
-        # disable iptables rules for bridged interfaces
-        if [[ -e /proc/sys/net/bridge/bridge-nf-call-iptables ]]; then
-            echo 0 > /proc/sys/net/bridge/bridge-nf-call-iptables
-        fi
-
-        # to initialize the bridge interface correctly we need to do the following:
-        #
-        # 1) save the IPs and route table of INTERNET_IFACE
-        # 2) if NetworkManager is running set INTERNET_IFACE as unmanaged
-        # 3) create BRIDGE_IFACE and attach INTERNET_IFACE to it
-        # 4) set the previously saved IPs and route table to BRIDGE_IFACE
-        #
-        # we need the above because BRIDGE_IFACE is the master interface from now on
-        # and it must know where is connected, otherwise connection is lost.
-        if ! is_bridge_interface $INTERNET_IFACE; then
-            echo -n "Create a bridge interface... "
-            OLD_IFS="$IFS"
-            IFS=$'\n'
-
-            IP_ADDRS=( $(ip addr show $INTERNET_IFACE | grep -A 1 -E 'inet[[:blank:]]' | paste - -) )
-            ROUTE_ADDRS=( $(ip route show dev $INTERNET_IFACE) )
-
-            IFS="$OLD_IFS"
-
-            if networkmanager_is_running; then
-                networkmanager_add_unmanaged $INTERNET_IFACE
-                networkmanager_wait_until_unmanaged $INTERNET_IFACE
-            fi
-
-            # create bridge interface
-            ip link add name $BRIDGE_IFACE type bridge || die
-            ip link set dev $BRIDGE_IFACE up || die
-            # set 0ms forward delay
-            echo 0 > /sys/class/net/$BRIDGE_IFACE/bridge/forward_delay
-
-            # attach internet interface to bridge interface
-            ip link set dev $INTERNET_IFACE promisc on || die
-            ip link set dev $INTERNET_IFACE up || die
-            ip link set dev $INTERNET_IFACE master $BRIDGE_IFACE || die
-
-            ip addr flush $INTERNET_IFACE
-            for x in "${IP_ADDRS[@]}"; do
-                x="${x/inet/}"
-                x="${x/secondary/}"
-                x="${x/dynamic/}"
-                x=$(echo $x | sed 's/\([0-9]\)sec/\1/g')
-                x="${x/${INTERNET_IFACE}/}"
-                ip addr add $x dev $BRIDGE_IFACE || die
-            done
-
-            # remove any existing entries that were added from 'ip addr add'
-            ip route flush dev $INTERNET_IFACE
-            ip route flush dev $BRIDGE_IFACE
-
-            # we must first add the entries that specify the subnets and then the
-            # gateway entry, otherwise 'ip addr add' will return an error
-            for x in "${ROUTE_ADDRS[@]}"; do
-                [[ "$x" == default* ]] && continue
-                ip route add $x dev $BRIDGE_IFACE || die
-            done
-
-            for x in "${ROUTE_ADDRS[@]}"; do
-                [[ "$x" != default* ]] && continue
-                ip route add $x dev $BRIDGE_IFACE || die
-            done
-
-            echo "$BRIDGE_IFACE created."
-        fi
-    fi
-else
-    echo "No Internet sharing"
-fi
-
-# start dns + dhcp server
-if [[ "$SHARE_METHOD" != "bridge" ]]; then
-    iptables -I INPUT -p tcp -m tcp --dport 53 -j ACCEPT || die
-    iptables -I INPUT -p udp -m udp --dport 53 -j ACCEPT || die
-    iptables -I INPUT -p udp -m udp --dport 67 -j ACCEPT || die
-    dnsmasq -C $CONFDIR/dnsmasq.conf -x $CONFDIR/dnsmasq.pid || die
-fi
-
-# start access point
-echo "hostapd command-line interface: hostapd_cli -p $CONFDIR/hostapd_ctrl"
-
-# from now on we exit with 0 on SIGINT
-trap "clean_exit" SIGINT
-trap "clean_exit" SIGUSR1
-
-if [[ $NO_HAVEGED -eq 0 ]]; then
-    haveged_watchdog &
-    HAVEGED_WATCHDOG_PID=$!
-fi
-
-# start hostapd
-hostapd $CONFDIR/hostapd.conf &
-HOSTAPD_PID=$!
-echo $HOSTAPD_PID > $CONFDIR/hostapd.pid
-
-if ! wait $HOSTAPD_PID; then
-    echo -e "\nError: Failed to run hostapd, maybe a program is interfering." >&2
-    if networkmanager_is_running; then
-        echo "If an error like 'n80211: Could not configure driver mode' was thrown" >&2
-        echo "try running the following before starting create_ap:" >&2
-        if [[ $NM_OLDER_VERSION -eq 1 ]]; then
-            echo "    nmcli nm wifi off" >&2
-        else
-            echo "    nmcli r wifi off" >&2
-        fi
-        echo "    rfkill unblock wlan" >&2
-    fi
-    die
-fi
-
-clean_exit
-
-# Local Variables:
-# tab-width: 4
-# indent-tabs-mode: nil
-# End: